Craigslist is for Metropolis communities mainly. Google Base is a "searchable" ebay, without bidding. I prefer Ebay, but Google Base will allow you to buy things with "Google Money." Google Base is a very good way to get rich fast, and it is a very useful tool, after you try it out more. I don't really like Craiglist, but Google Base grows very fast, and I assume they both have their own personal usage.